Respiratory Distress and Failure - NREMT AEMT Level

1. Which device is preferred for a spontaneously breathing patient needing high oxygen concentration?

   Nonrebreather mask. Provides high FiO2 up to 100% by using a reservoir bag and one-way valves to minimize room air entrainment.

2. Which assessment finding best indicates increased work of breathing?

   Accessory muscle use or retractions. These physical signs reflect the body's effort to recruit additional muscles to overcome increased respiratory resistance or decreased lung compliance.

3. What is the operational definition of respiratory distress in prehospital care?

   Increased work of breathing with adequate ventilation and oxygenation. This definition captures the compensatory phase where patients exhibit labored breathing but maintain sufficient gas exchange without immediate decompensation.

4. Which medication is used to reduce airway inflammation in moderate to severe asthma exacerbation?

   Systemic corticosteroid (for example, methylprednisolone). Inhibits inflammatory mediators to reduce airway edema and mucus production in exacerbations.

5. Which breath sound finding is most consistent with fluid in the alveoli?

   Crackles (rales). Discontinuous sounds produced by air bubbling through alveolar fluid, indicating pulmonary edema or pneumonia.

6. Which medication class is first-line for acute bronchospasm in asthma?

   Inhaled beta-2 agonist (for example, albuterol). Stimulates beta-2 receptors to relax bronchial smooth muscle, rapidly relieving acute airway obstruction.

7. Which condition is a contraindication to inserting a nasopharyngeal airway?

   Suspected basilar skull fracture or severe midface trauma. Risks inadvertent intracranial placement through cribriform plate defects, potentially causing brain injury or infection.

8. What is the primary indication to begin bag-valve-mask ventilation?

   Inadequate breathing (poor rate, depth, or tidal volume). Assisted ventilation is required when spontaneous breathing fails to achieve adequate minute volume for gas exchange.

9. Which breath sound finding most strongly suggests lower airway bronchospasm?

   Wheezing. High-pitched expiratory sounds result from turbulent airflow through constricted lower airways due to smooth muscle contraction.

10. What does hypercapnia mean?

    Elevated arterial carbon dioxide level. Indicates ventilatory failure where CO2 retention occurs, typically above 45 mmHg, leading to respiratory acidosis.

11. Which therapy is commonly indicated for acute cardiogenic pulmonary edema with respiratory distress?

    CPAP, if not contraindicated. Positive end-expiratory pressure recruits alveoli, reduces work of breathing, and decreases cardiac preload.

12. Which airway adjunct is generally appropriate for a semiconscious patient with a gag reflex?

    Nasopharyngeal airway (NPA), if no contraindication. Tolerated in patients with intact gag reflex as it does not stimulate the oropharynx, maintaining patency in altered mental status.

13. Which pattern best describes anaphylaxis-related respiratory compromise?

    Wheezing with hypotension and urticaria or angioedema. Systemic allergic response triggers mast cell degranulation, causing bronchoconstriction and vasodilatory shock.

14. Which breath sound finding may indicate severe obstruction with minimal air movement?

    Diminished or absent breath sounds. Reflects profound airflow limitation, such as in pneumothorax or severe asthma, where minimal ventilation reaches lung fields.

15. Which intervention is indicated for suspected opioid-induced respiratory depression?

    Naloxone with ventilatory support as needed. Opioid antagonist reverses central respiratory depression by competing for mu-receptors, restoring ventilatory drive.

16. Which device is preferred when precise oxygen concentration is needed (for example, COPD)?

    Venturi mask. Allows delivery of controlled FiO2 percentages to prevent oxygen-induced hypercapnia in patients with chronic hypoxic drive.

17. Which single finding is most concerning for impending respiratory failure?

    Decreasing mental status (fatigue with poor respiratory effort). This indicates respiratory muscle exhaustion, signaling progression from distress to failure with imminent risk of arrest.

18. What does hypoxemia mean?

    Low arterial oxygen level. Refers to insufficient oxygen partial pressure in arterial blood, often below 60 mmHg, compromising tissue oxygenation.

19. Which one finding most strongly suggests tension pneumothorax in a crashing patient?

    Severe dyspnea with absent unilateral breath sounds and hypotension. Combination indicates intrathoracic pressure buildup compressing lung and shifting mediastinum, impairing venous return.

20. What is the operational definition of respiratory failure in prehospital care?

    Inadequate ventilation or oxygenation, or both, with impending arrest risk. This describes the decompensated state where gas exchange fails, leading to potential cardiopulmonary arrest if not addressed promptly.

21. Identify the best next step when SpO2 is low but waveform is poor and the patient looks well.

    Troubleshoot pulse oximeter accuracy before escalating therapy. Poor plethysmograph suggests artifact or poor perfusion, making SpO2 unreliable despite clinical stability.

22. What is the key clinical difference between asthma and COPD during an acute episode?

    Asthma is often reversible bronchospasm; COPD is chronic airflow limitation. Asthma involves episodic, reversible obstruction from inflammation; COPD features persistent structural damage limiting airflow.

23. Which breath sound finding suggests upper airway obstruction such as croup or foreign body?

    Stridor. Inspiratory crowing noise from turbulent flow through narrowed upper airway, often due to edema or obstruction.

24. Which condition is classically associated with pink, frothy sputum and crackles?

    Pulmonary edema (often cardiogenic). Increased hydrostatic pressure forces fluid into alveoli, producing characteristic sputum and auscultatory findings.

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